Pulley-driven disk fan



Nov. 8, 1932.

G. DE BOTHEZAT PULLEY DRIVEN DISK FAN Filed June 50, 1928 ZZ J6 ...03 3 9.,. 32 e 0 0 0 4 'n e 27 3.1i." ZZ o o Z a o J6 vr .a2 3f INVENTOR.

geo/:ge e oejaf BY E? ci TTORNEYS.

Patented News, .19.5.2

UNITED sTATEs GEORGE a norrmza'i,l or NEW Yonx, N. Y.

rULLEY-DEIvEN msx rm Application med ,Tune 30,

This invention vrelates to a rotary fan unit and more particularly to a fan unit having a fan of the disk pressure type.

The object of the invention is to provide a heavy duty, large diameter motor drlven fan unit of convenient form and compact 1n overall dimension having a fan of the disk pressure type for forcing air in a generally amel direction and capable of developing high m static pressure. Further objects and advantages of the 1nventionwill be apparent from the following specification and drawing in which Fig. 1 is a front elevation of a fan unit constructed in accordance with this invention. Fig. 2 is a sectional elevation taken on line 2-2 of Fig. 1.

Fig. 3 is al development of the blades and disks of the fan taken on line3-3 of Fig. 9 1, and- Fig. 4 is a development similar to- Flg. 3 showing a modified form of .fan blade construction. p p

As shown. in the drawing, the whole unit is supported on an'integral casting 10. ,The casting 10 is provided -with a circularrlng 11 in which thefan rotates, havinga reenforcing flange 12. The flange 12 is prom vided at spaced intervals with extenslons 13, 14, and 15 in which apertures 16 are `provided for bolts or the like to ixedly attach and support the fan unit as a whole to a wall or lother support with the ring 11 extending through a circular opening in the wall or other support. The elongated bearing 18 is spaced from, centered and rigidly v attached to the ring 11 and ila-nge 12 by e'xtending arms 19, 20 and 21 leading from thev o extensions 13, 14 and 15. The extension 14 extends around the periphery ofthe flange( 12 a substantial distance and has extending vtangentiall'y therefrom a fiat top table 22 supported by arm 20 as clearly shown `in Fig. A415 2. "A'source of power such as a motor 23 is fixed to table' 22 having a pulley 24 driving a belt which passes over pulley 26 fixed on the inner end of fan shaft 27 rotatable in bearing 18. In some cases it may be desirable -10 to connect the motor 23 to the shaft `27 by 192s. sarna m. saas'u. i

means of a chain or other device, the belt driving merely being shown by way of illustration. v

' The fan `is of the disk pressure type having a hub 28 keyed or otherwise secured to the shaft 27. The hub 28 is ilanged at 29 and has secured on either side by rivets 30 or like means the spaced boss flanges or disks 31 and 32. The aeroform fan blades 33 are spaced and secured between the bosses or disks 31 and 32 at their circumference and arev of the 37 forming a rigid supporting means for the fan blades as clearly shown in Fig. 3.

In Fig. 4 is shown a modified means for securing'the fan' blades 33 to the boss or diskl 31 which consists of a strip 38 secured at 40. It will be noted that the blade angle n 1n the construction shown in Figs. 3 and 4 are identical. Y The fan constructed in accordance with this invention is rigidi assembled and is especially adaptable for eavy duty wherein fans of large diameters are required. Furthermore it is not essential that the motor for operating the fan be located at the top of the unit as-illustrated in the drawing, but may be placed in any position about the circumference of the fan.

Rotation of the fan of this linvention creates a suction and theair i's drawn to it 1n an axial direction. Thel air asit asses through the fan acquires a rotationa mo-` tion aswell as an axial motion leaving'the fan in a. smoother flow'with substantiall e ual axial pressures throughout the lexgt o the blades forcing the ow. Thus the ow from the fan isalways free from eddy or cross current.

I claim;v f l 1.1. A Aheavy lduty fan unit comprising -a. dlsk pressure fan, a rotating motor therefor, the axes of the shaft land motor being out -one end to the fan blades by rivets 39 and at its opposite end to the disk31 by rivets of line with each other, driving connections between' the motor and the fan disposed at one side only of the plane of rot-ation of the fan, and a one-piece casting providing a support for saidfan, said motor and said connections, said casting comprising a fan shaft bearing, a motor seat, and supporting arms for said bearing, said arms constituting the sole support of said bearingand all of them -being disposed at the same side of the plane of rotation of the fan as said driving connections, said motor seat being interposed be.- tween said motor and the air currents generated by said fan.

- portion by one of said arms; a fan shaft in 2. In a fan unit the combination with a disk fan, of a one-piece casting comprising a ring member surroundin said disk fan, integral arms rigid with an extending from said ring member, an elongated shaft bearing supported by said arms, and a table supported along one -edge by said ring and at right angles thereto along its under middle said bearing, a motor on said table; and means connecting said motor and said shaft for rotating said shaft and said fan, said arms constituting the sole support of the fan shaft bearing and all of them being disposed at one side only of the plane of rotation ofthe fan.

'3. In a fan unit, a fan comprisin a hub,

two independent spaced disks secure to said hub, fan blades secured at their inner ends between said disks, said disks constituting the solel support of said blades, a one-piece casting comrising a supporting ring membei,` surroun ing supported by said arms, an a sup orting ta le extending from said ring mem er and supported by one of said arms, a motor on said table, a fan shaft in said bearing to which said hub is secured, and means connecting said shaft and said motor for rotating said fan, the supporting arms of the shaft bearing constituting its sole support, all vof said arms being arranged at one side onl of the plane of rotation of the iemand sai table shielding said vmotor from the air currents generated by said fan.

ing said fan blades, arms ex t tending from said ring member a shaft bearing arms constituting the sole support ofthe fan shaft bearing and all of them being disposed at one side only of the plane of rotation of the fan, and said motor shelf being interposed between said motor and the air currents generated by said fan.

' yGEORGE nu BOTHEZAT.

yms

4. A heavy duty fan unit comprising a .a motor shelf, a protecting ring surroun ing the fan, and connectin arms,'a1l integral and rigid with 'each ot er, the connect- 

